V718 Persei

V718 Persei is a young star in the constellation of Perseus, located in the young open cluster IC 348. The star has several designations derived from the cluster in which it belongs (H 187, TJ 108, HMW 15, LRL 35, NTC 5401, LNB 90—all require the prefix "IC 348"). The star shows hints of an occulting body of unclear nature, likely planetary.

V718 Persei
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Perseus
Right ascension 03h 44m 39.241s
Declination +32° 07′ 35.52″
Apparent magnitude (V) 15.82
Characteristics
Spectral type K3V
Variable type T Tauri-type?
Astrometry
Distance≈1043 ly
(≈320[1] pc)
Details
Mass1.6[1] M☉
Radius≈2.3 R☉
Luminosity3.4[1] L☉
Temperature5100-5350[1] K
Age5 million years
Other designations
V718 Per, CXOPZ J034439.2+320736, CXOPZ 153, 2MASS J03443924+320735
Database references
SIMBADdata

A planetary system?

In 2008 Grinin et al. invoke the possible presence of a substellar object to explain peculiar and periodic eclipses occurring to the young star every 4.7 years.[1] The presence of a planetary object is still invoked in a recent research.[2] They infer a maximum mass of 6 times that of Jupiter for the perturbing object and an orbital separation of 3.3 astronomical units.

The V718 Persei planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b (unconfirmed) ≤6 MJ 3.3 1715.5 0 — —

References
  1. Grinin; Stempels, H. C.; Gahm, G. F.; Sergeev, S.; Arkharov, A.; Barsunova, O.; Tambovtseva, L. (2008). "The unusual pre-main-sequence star V718 Per (HMW 15)". Astronomy and Astrophysics. 489 (3): 1233–1238. arXiv:0808.1069. Bibcode:2008A&A...489.1233G. doi:10.1051/0004-6361:200810349.
  2. Herbst; et al. (2010). "The Light Curve of V713 Per (HMW 15): Evidence for Gravitational Sculpting by an Object Embedded in the Circumstellar Disk". American Astronomical Society, AAS Meeting#215,#429.31. 215: 429.31. Bibcode:2010AAS...21542931H.


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